turf-destination strips altitude/elevation member from origin coordinate.
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Description
The destination function does not return all members of the origin parameter.
https://github.com/Turfjs/turf/blob/master/packages/turf-destination/index.ts#L40
Note the return value creates a Position array with [lng, lat], but the origin parameter may have a third element, which should be carried over.
https://github.com/Turfjs/turf/blob/master/packages/turf-destination/index.ts#L70
GeoJSON specifies that a Position may have a third element, representing altitude or elevation.
https://datatracker.ietf.org/doc/html/rfc7946#section-3.1.1
This also affects turf-ellipse, which uses destination in its conversion of an ellipse to a polygon.
https://github.com/Turfjs/turf/blob/master/packages/turf-ellipse/index.ts#L151
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with packages/turf-destination/index.ts at the referenced lines and inspect how the destination position is constructed. Check packages/turf-ellipse/index.ts to understand the affected conversion. Done means destination preserves the origin's altitude or elevation member and ellipse output remains correct.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- typescript
- Domain
- data
- Issue type
- Bug
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 55/100